Ventilator



H. J. YELDHAM.

VENTILATOR. APPucArloN man SEPT. 14, 1.914.

y 1,406,321. Patented Fel 14, 1922h ll j@ um a Ml y @M P ATENT 0 ifiliil HARMON J. YELDHAM, OF CHICAGO, ILLINOIS.

VENTILATOR.

Specification of Letters Patent.

Patented Feb. 14, 1922.

Application led September 14, 1914. Serial No. 861,490.

To all w 720m it may conccwi:

Be it known that L Hannon J. YELD- HAM, a citizen ot the United States, residin Chicagofin the county ot Cook and State ot Illinois, have invented a new and nseiul improvement in Ventilatore, of which the following is a specification.

My invention relates in general to ventilators and has more particular reference to ventilators adapted for attachment to the end of a chimneypliue. ventilator shaft and the like.

Prior to my invention, I am aware that it has Vtreohuently been the custom to attach to the end of a chimney, iiue, air ventilator shaft, a hooded metallic pipe section having apertures in its side and provided with means for detlecting the Vair into said openings 'from without. The best results, in devices of thissort, are believed to be obtained when the air entering the side holes in the ventilator is deflected upwardly, and to this end certain ot' these detlectors used prior to my invention have been inclined to give the air such a dellection before entering' the ventilator. Prior te my invention7 however, these del'lectors have been located without 'the metallic tube and consequently have served merely to introduce the air into the tube and have been able to exert no positive 'effect on the entering air stream within the tube itself.

lit is a principal object of the 'present in vention to provide a more eliioient deiiector within a ventilator of this Igeneral type for giving to the air entering the openings an upward movement positively produced within the ventilator, thereby heightening the effect of the ventilator by producing a strong; upward draft which will. pull the air or smoke or other gases upwardly from beneath the openings through which the outside a-ir is admitted.

A further object 'of the invention is to provide such a device which will be cheap to manufacture, pleasing in appearance and not likely to be damaged in installation` or use.

Other objects and advantages ot the invention will be apparent as it is better understood from the following description when considered in connection with the accompanying drawing illustrating a preferred embodiment thereofv On the drawings- Fig. l is a side elevation of a ventilator provided with my invention.

2 is a vertical, central, sectional view oi' the same.

Fig'. 3 is a horizontal section taken substantially on the line 3 3 of Fig. 2; and

Fig. t is a similar view taken substantially on the line 4 4 of Fig. 2. L

For the purpose of illustrating my invention l have shown it embodied in a ventilator comprising` a cylindrical member 5, a hood 6, upper and lower truste conical members 7, `outside detlector S and inside detlectors 9.

The cylindrical member o is provided with a plurality ot openings l() in its side near its lower end, tour such openings being); shown in the present instance. These openings ar'e'located at regular intervals about the cylindrical member so that any moving' current of air may enter one or more of them. YVithin each opening an internal dei'lector'Q is provided, and in the present instance these del'lectors consist of single piece of sheet metal curved transversely Vand flaring' out ardly from the lower edge ll to the top 12. The lower edge ot each detlector is secured beneath its corresponding opening' l0 in the cylindrical member and its side edges 13 are also secured 'to the adjacent surface oit the cylindrical member so that air entering` through an opening l() must pass upwardly to the upper end ol the internal deilector 9 betere mingling with the air within. the ventilator.V The flaring shape of the deflectors 9 causes them to extend upwardly and inwardly of the cylindrical member from beneath the openings and producesa thereby, a positive deflection in the entering air streams upwardly and inwardly of the ventilator as is best productive et highest efl'iciency.

In the present inst-ance7 I provide the outside delector S which enc-ircles the cylindrical member 5 to aid in this deflection of the enteringv air stream and this detlector eX- tends downwardly and outwardly from just above the openings l0. The deflector 8, in the present instance, consists of a single piece ci sheet metal bent to proper form and this member is secured in place by being fastened to an outwardly and downwardly haring Harige 14, formed on a second cylindrical member 15 which is fitted over the upper edge of the cylindrical member' ,0. The internal defleotors 9 may, if desired, be extended above the upper edge of the cylindrical member 5 and the adjacent portions of the side edges 13 of these deectors be fastened to the adjacent surface of the cylindrical member 15.

rlhe lower frusto conical portion 7, in the present instance, is provided by flanging the upper edge cf the upper cylindrical portion 15, as seen in Fig. 2. The upper frusto conical portion consists merely of an annular sheet of metal of flaring shape adapted to engage, at its lower and larger edge with the upper edge of the lower frusto conical portion 7 and is provided at its upper edge with an upwardly extending flange 16 by which it is secured in place, as will be later explained. l

A plurality of supports 17, four in the present instance, are provided to hold the hood 6 and the upper frusto conical portion in place. rlhese supports each consist r of a metallic strip fastened at its lower end at 18 to the cylindrical portion of the upper cylindrical member 15. l This strip extends upwardly vertically to above the'liange 16 of the upper frusto conical portion to which it is fastened at 19 in any suitable fashion. Above the flange 16 each support is deflected outwardly and provided with an end 2O bent to the curvature of the internal surface of the hood 6 to which it is fastened at 21. The hood 6 is held above the top of the upper conical portion a substantial distance to provide a space for the upwardly moving v air and gases to pass out of the ventilator and this hood consists, in the present instance, of a sheet of appropriate metal of conical form. A delector 22 of sheet metal, also bent to conical form, is secured centrally within the hood in inverted position to drive the gases out between the hood and the body of the ventilator.

The whole device is of simple and cheap construction and can be readily installed by slipping the lower edge of the cylindrical member either within or about the upper end of a chimney flue or ventilator shaft where it may be held in place in any usual or preferred manner,

It is thought that the invention and many of its attendant advantages will be under-- stood without further description and it will be obvious that various changes may be made in the form, construction and arrangement of the parts described without departing from the spirit or scope of the invention or sacrificing any of its material advantages, theV form hereinbefore described being merely a preferred embodiment thereof.

l claim 1. A ventilator comprising an upright tu bular member having apertures extending through it, sheet metal semi-cylindrical deiiecting members secured to the inner side of said upright member and behind said apertures, said deliecting members being inclined slightly inwardly and sharply upwardly within said upright tubular member to form vertically elongated relatively narrow `flues from said apertures for directing outside air upwardly lengthwise of said tubular member and leaving said tubular member substantially unobstructed, and means at the top of the ventilator for providing an' air storage space extending beyond the vertical walls of said tubular member.

2. A ventilator comprising a tubular iiue, apertures above the bottom of the tubular flue for admitting outside air, an exterior deecting member inclined downwardly and outwardly over said apertures, semi-cylindrical steeply inclined flues arranged within the tubular flue and at said apertures, and

providing for the vertical deflection of the entering outside air, said semi-cylindrical fines extending from beneath the apertures to adjacent the top of said tubular flue.

3. A ventilator comprising a tubular iiue, apertures above the bottom ofthe vtubular flue for admitting outside air, semi-cylindrical fines arranged within said tubular flue and at said apertures, and providing for the vertical deflection of the entering outside air, and an air storage chamber extending circumferentially of the tubular flue and outwardly beyond the vertical walls thereof and justabove the tops of said semi-cylindrical iiues.

4l. A ventilator comprising a tubular flue, apertures above the bottom of the tubular flue for admitting outside air, semiecylindrical steeply inclined flues arranged within said tubular flue and at said apertures, and providing for the vertical deflection of the entering outside air, and an Vair storage chamber above the tops of said semi-cylin drical ues and extending substantially from said tops to the outlet of the ventilator, and

means at the top of the ventilator for delecting the air outwardly. Y

HARMON J. YELDHAM.

WTitnesses 'ESTHER ABRAMs, JOHN P. GIBSON. 

